Artificial teeth.



.IN PATENTED OCT. 17 1905.

04 801,911 G. RAUHE.

ARTIFICIAL TEETH.

APPLICATION nun JULY 1, 1904. nnnwnn um. 19. 1005.

UNITE STATES PATENT @FFIQE.

ARTIFICIAL TEETH.

Specification of Letters Patent.

Patented Oct. 17, 1905.

Application filed July 1, 1904. Renewed gus 19, 1905. Serial No. 274.967.

To (1/7] whom it may concern.-

Be it known that I, CARL RAUHE, a citizen of the German Empire, residing at Dusseldorf, Germany, have invented certain new and useful Improvements in Sets of Artificial Teeth, of which the following is a specificatlon.

My invention relates to an art of manufacturing a device for retaining a set of artificial teeth in position by atmospheric pressure, in which a button of india-rubber or of any other suitable material is produced and employed in combination with a soft indiarubber disk which can be drawn over the said button. In the present methods of manufacturing the said device there is produced on a matrix applied on the plaster-cast model of the jaw a cavity between the roof of the mouth and the denture, the said cavity acting either as a suction part itself or being filled by a soft india-rubber disk secured to the set of teeth by means of rivets or screws, thereby materially increasing the suction-power. This india-rubber disk gets, however, spongy in the mouth, and therefore must be replaced by a new one from time to time, a task requiring the services of a dentist, because it is usually too difficult for the person using the artificial teeth to himself fix the rivet and plate or screw and platetixtures. Another drawback is that the rivet or plate or screw, being never fitted to accommodate itself to the shape of the jaw,

often causes a feeling of disagreeable pressure in the respective place.

The object of my invention is to remove the disadvantages set forth, and the device, together with the tin matrix employed and hereinafter mentioned, is illustrated by the accompanying drawings in Figures 1 to 10. The said matrix is composed of three parts a Z) c, (illustrated by Figs. 1, 2, 3,) put together as shown by Fig. L I press it by means of a suitable tool to the spot of the gypsoplast of the jaw, where it is intended to place the suction device. Tin is a soft material and will easily accommodate itself to the-plaster cast. It may, however, be replaced by any other suitable material. I now take apart the matrix and secure, by means of pins or plugs (Z, the part a to the plaster cast, to the shape of which it will accommodate. Leaving the part c aside, I then insert the part 6 again into the part a and fill the set, as customary, with caoutchouc, taking care that the portion which had been occupied by the said part c is likewise duly filled. After the necessary vulcanization of the caoutchouc I remove the matrix, and there remains now on the side of the palate an annular recess 0, with a button or knob f in the center corresponding to the shape of the said portion 0. 9.) The removal of the said matrix I accomplish by taking oflf the said portion a and cutting through the part b. If the latter is composed of several subparts, these may be easily drawn out from under the'in .lia-rubber button. After such removal as described I draw the soft india-rubber disk illustrated by Figs. 5 and 6 over the hardrubber button and substitute for the disk a new one. This operation may be easily performed by the person using the teeth.

The knob or button may as well be made of gold orany other suitable metal, being given the shape of a disk with a small rod or plug. (See Fig. 8.) In this case the part 0 may be omitted from beginning, and a button-plate it with a small plug may be inserted in the matrix, so that a button is produced, as shown in Fig. 10.

The knob of the India-rubber button may be given any size by correspondingly changing the tin matrix; I prefer to make the neck of the hard-rubber button a trifle thicker than the size of the hole in the soft-rubber disk, so that the soft india-rubber disk will press against the india-rubber button, assuming the shape of a cornet, which favors more or less suction. The button may be screwed to or otherwise secured to the set.

hat I claim as my invention, and desire to protect by Letters Patent, is-

1. An art of manufacturing a device to retain a set of artificial teeth in position by atmospheric pressure consisting of pressing upon the plaster-cast model of a jaw a matrix provided with a removable inner part, then taking apart the said matrix, securing the outer part to the said plaster cast, leaving the said inner part of the matrix aside, filling the set including the part which had been occupied by the said inner part with caoutchouc, vulcanizing the latter and removing the matrix, substantially as described and for the purposes set forth.

2. In a device for retaining a set of artificial (See Fig.

teeth in position by atmospheric pressure the combination of a button of india-rubber, metal or any other suitable material, being secured to the set, With a soft india-rubber disk adapted to be drawn over the said button, substantially as described and for the purposes set forth.

In testimony whereof I have hereunto subscribed my name in the presence of two Witsses.

CARL RAUHE.

Witnesses:

PETER LIEBER, WILLIAM ESSENWEIN. 

